You can do almost everything if you'll not move (it will cancel item buff). Use items, change player model with buffs, etc.
My favorite action - use Shell, then use Volvar mug, and then throw some tables! Perfect!
Remember that if you want your achievement, DONT TAKE ANY DMG! Even campfire near quest giver will fail your quest. Any damage will fail.
So, since you've taken the quest avoid any damage before turn-in
This is correct for both criterias.